Cook Islands · 1991–2020

Best time to visit
Avarua.

June leads for comfortable weather in Avarua: typically 26.6°C by day, 20°C at night, with 53 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortJune

Typical high26.6°C

Typical low20°C

Rain in June53 mm

Comfort

June

June · August · September

76climate match

Beach

June

June · October · November

82climate match

Outdoors

June

June · August · September

54climate match

The weakest month is January, scoring 36 against June’s 76 — 200 mm of rain falls, and days average 29.4°C, 5° above the 24°C the score treats as ideal.

Month by month

The whole year,
without the guesswork.

The bars show the comfort score. Day and night temperatures come from daily observed highs and lows; rain is the historical monthly estimate.

Jan

3629.4° / 23.3°

Feb

3829.9° / 23.5°

Mar

3929.8° / 23.5°

Apr

4629° / 22.7°

May

5827.5° / 21°

Jun

7626.6° / 20°

Jul

7325.8° / 19.1°

Aug

7625.5° / 19°

Sep

7426.1° / 19.5°

Oct

7326.8° / 20.2°

Nov

6228.1° / 21.6°

Dec

4328.7° / 22.5°

Monthly climate evidence for Avarua — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 14 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	29.4°C	23.3°C	200 mm	12.7	27.1°C	13 h 17	36	Good coverage
February	29.9°C	23.5°C	170 mm	12.6	27.5°C	12 h 50	38	Good coverage
March	29.8°C	23.5°C	160 mm	13.7	27.6°C	12 h 16	39	Good coverage
April	29°C	22.7°C	154 mm	11.3	27.3°C	11 h 38	46	Good coverage
May	27.5°C	21°C	130 mm	10	26.3°C	11 h 07	58	Good coverage
June	26.6°C	20°C	53 mm	7.3	25.4°C	10 h 51	76	Good coverage
July	25.8°C	19.1°C	97 mm	8.1	24.7°C	10 h 57	73	Good coverage
August	25.5°C	19°C	90 mm	8	24.4°C	11 h 23	76	Good coverage
September	26.1°C	19.5°C	81 mm	7.3	24.4°C	12 h	74	Good coverage
October	26.8°C	20.2°C	63 mm	7.4	24.8°C	12 h 37	73	Good coverage
November	28.1°C	21.6°C	99 mm	7.6	25.6°C	13 h 09	62	Good coverage
December	28.7°C	22.5°C	186 mm	10.9	26.5°C	13 h 25	43	Good coverage

Records at RAROTONGA INTL, 1979–2025
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	32.8°C9 Jan 2017	18.0°C1 Jan 1981	159 mm18 Jan 1987	453 mm2008 · driest 7 mm in 2002	44
February	36.0°C13 Feb 1980	18.2°C26 Feb 2012	159 mm25 Feb 1986	379 mm1991 · driest 7 mm in 2010	44
March	34.2°C20 Mar 2001	17.0°C29 Mar 2016	151 mm13 Mar 2024	322 mm2023 · driest 7 mm in 1981	45
April	33.2°C18 Apr 1999	14.8°C2 Apr 2012	197 mm21 Apr 1985	447 mm1995 · driest 23 mm in 2007	44
May	36.0°C4 May 1979	14.8°C11 May 1998	383 mm30 May 2003	442 mm2003 · driest 0 mm in 1979	45
June	32.0°C16 Jun 2012	12.4°C19 Jun 2025	157 mm11 Jun 2004	245 mm1988 · driest 2 mm in 1981	45
July	31.1°C14 Jul 2023	12.8°C12 Jul 1987	134 mm8 Jul 1993	223 mm1993 · driest 6 mm in 2015	43
August	31.8°C12 Aug 2023	11.2°C30 Aug 2003	167 mm25 Aug 2010	206 mm2010 · driest 1 mm in 2011	44
September	31.5°C12 Sep 2003	10.5°C3 Sep 2012	92 mm18 Sep 2014	221 mm1996 · driest 1 mm in 1999	45
October	31.4°C16 Oct 2015	10.6°C14 Oct 2011	127 mm29 Oct 2007	207 mm1983 · driest 7 mm in 2006	43
November	32.9°C24 Nov 2010	11.0°C6 Nov 1981	140 mm27 Nov 1989	379 mm1988 · driest 4 mm in 1979	41
December	36.0°C4 Dec 1980	15.0°C4 Dec 1980	175 mm8 Dec 2003	395 mm2003 · driest 14 mm in 2004	44

Typical days per month at RAROTONGA INTL, 1991–2020
Month	Days 25°C+	Days 30°C+	Heavy rain (10 mm+)
January	22	7	3
February	22	10	3
March	22	10	3
April	21	5	3
May	20	1	2
June	18	<1	1
July	15	<1	2
August	13	0	1
September	15	<1	1
October	19	<1	1
November	21	2	2
December	21	3	3

How often, not how much — every day in RAROTONGA INTL’s record sorted by what it was actually like, rather than averaged
Month	Warm & dry days	Wet days	Washouts	Week with 3+ wet days	Daytime mean has ranged
January	60%	42%	16%	49%	28.6–30.0°C
February	57%	43%	18%	46%	29.1–30.8°C
March	59%	41%	14%	49%	28.8–30.7°C
April	59%	41%	15%	57%	28.0–30.1°C
May	65%	35%	11%	46%	26.5–28.5°C
June	75%	27%	7%	34%	25.4–27.3°C
July	74%	27%	9%	29%	24.6–26.9°C
August	74%	26%	7%	25%	24.2–26.4°C
September	74%	25%	7%	28%	24.7–27.2°C
October	74%	25%	7%	23%	26.1–27.6°C
November	74%	28%	10%	29%	26.9–29.0°C
December	64%	37%	13%	43%	27.6–29.5°C

A warm and dry day reaches 20°C with under 1 mm of rain; a wet day gets 1 mm or more; a washout gets 10 mm or more. The week column is the share of seven-day stretches in that month, across the station’s whole daily record, that contained three or more wet days — the odds a week-long trip is rained on repeatedly, counted rather than modelled. The last column is the 10th to 90th percentile of that month’s daytime average across individual years: a narrow band means the average is what you will get, a wide one means the average is a midpoint between years that felt quite different.

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4035715
NOAA station: CWM00091843 · RAROTONGA INTL
Station distance: 3.2 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 20 usable years
Daylight: Calculated from latitude -21.21°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 14 km from the place centre. A sheltered bay can run warmer than the open sea it is measured from.
Important limit: Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.

These places read the same station, so their numbers are identical — distance from RAROTONGA INTL is what differs

Matavera→Titikaveka→Ngatangiia→Muri→Avatiu→Nikao→

Or put two places side by side: Avarua vs Matavera

Best time to visitAvarua.

June

June

June

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Avarua.

The whole year,
without the guesswork.

Nearby, measured,
and named.